TABLE 2.
Summary of EDL muscle descriptive, force capacity, and power output data by surgical group.
| Groups Based on Change in Tendon Length
|
|||
|---|---|---|---|
| Control Tendon Length | Increased Tendon Length | Decreased Tendon Length | |
| Operated Leg EDL Muscle Mass (mg) | 178 ± 9 (16) | 172 ±13 (15) | 206 ±14*, † (8) |
| Unoperated Leg, EDL Muscle Mass (mg) | 172 ± 7 (8) | 165 ±13 (9) | 174 ± 6 (5) |
| Optimal Resting Muscle Length (mm) | 37.1 ± 1.4 (16) | 37.2 ± 1.5 (15) | 38.9 ± 1.3*, † (8) |
| Physiologic Cross-Sectional Area (mm2) | 11.4 ± 0.7 (16) | 10.9 ± 0.9 (15) | 12.5 ± 0.8*, † (8) |
| Maximum Isometric Force (mN) | 3985 ± 427 (13) | 3854 ± 279 (12) | 4488 ± 432*, † (8) |
| Specific Force (mN/mm2) | 350 ± 38 (13) | 350 ± 24 (12) | 361 ± 39 (8) |
| Maximum Power (mW) | 40.3 ± 3.8 (12) | 41.0 ± 9.0 (8) | 53.2 ± 6.3*, † (6) |
| Normalized Power (mW/g) | 225 ±16 (12) | 231 ± 38 (8) | 265 ± 38* (6) |
| Absolute Velocity (mm/s) | 38.4 ± 5.5 (12) | 43.7 ± 8.7 (8) | 43.4 ± 10.2 (6) |
| Relative Velocity (Lf/s) | 2.59 ± 0.4 (12) | 2.98 ± 0.6 (8) | 2.78 ± 0.6 (6) |
| Average Force during Isovelocity Maximal Power Movement (N) | 1.08 ± 0.2 (12) | 0.95 ± 0.2 (8) | 1.27 ± 0.3 † (6) |
Abbreviations used are: grams (g), milligrams (mg), millimeters (mm), square millimeters (mm2), Newtons (N), milli-Newtons (mN), milliwatts (mW), fiber length (Lf), seconds (s). Values listed are the mean ± standard deviation. The numbers of rats that completed each testing phase are listed in parentheses.
*
Indicates value significantly different from the Control Tendon Length group.
†
Indicates value significantly different from the Increased Tendon Length group. (p < .05).